The Marathon Shop - The Garmin Fenix 3 HR features an Omni-directional stainless steel EXO™ antenna, with GPS/GLONASS satellite reception, and has the ability to track in more challenging environments than GPS
Review: Garmin Fenix 3 HR GPS Watch - All Day Ruckoff
Garmin fenix 3 HR GPS multisport training smartwatch with built-in HR monitor at Crutchfield